Fix zindex property not working on polysec component.

Assets/Cryville/Crtr/Components/MeshBase.cs

@@ -22,7 +22,9 @@ namespace Cryville.Crtr.Components {
 		}
 		protected void UpdateZIndex() {
 			if (!mesh.Initialized) return;
-			mesh.Renderer.material.renderQueue = _zindex;
+			foreach (var mat in mesh.Renderer.materials) {
+				mat.renderQueue = _zindex;
+			}
 		}
 	}
 }